Because they do not realize how valuable it is.
Answer:
repose
Explanation:
re·pose1
/rəˈpōz/
noun
noun: repose
a state of rest, sleep, or tranquility.
"in repose her face looked relaxed"
1. die
2. harm
3. improves
4. had
5. stopped
6. would go
7. had had
8. would have loved
9. unless
10. saw